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34557-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 34557-54-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,5,5 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 34557-54:
125 % 10 = 5
So 34557-54-5 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017


1.1 GHS Product identifier

Product name methane

1.2 Other means of identification

Product number -
Other names -

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:34557-54-5 SDS

34557-54-5Relevant articles and documents

Hybrid carbon@TiO2 hollow spheres with enhanced photocatalytic CO2 reduction activity

Wang, Weikang,Xu, Difa,Cheng, Bei,Yu, Jiaguo,Jiang, Chuanjia

, p. 5020 - 5029 (2017)

Photocatalytic conversion of carbon dioxide (CO2) into solar fuels is an attractive strategy for solving the increasing energy crisis and greenhouse effect. This work reports the synthesis of hybrid carbon@TiO2 hollow spheres by a facile and green method using a carbon nanosphere template. The carbon content of the carbon@TiO2 composites was adjusted by changing the duration of the final calcination step, and was shown to significantly affect the physicochemical properties and photocatalytic activity of the composites. The optimized carbon@TiO2 composites exhibited enhanced photocatalytic activity for CO2 reduction compared with commercial TiO2 (P25): the photocatalytic CH4 production rate (4.2 μmol g?1 h?1) was twice that of TiO2; moreover, a large amount of CH3OH was produced (at a rate of 9.1 μmol g?1 h?1). The significantly improved photocatalytic activity was not only due to the increased specific surface area (110 m2 g?1) and CO2 uptake (0.64 mmol g?1), but also due to a local photothermal effect around the photocatalyst caused by the carbon. More importantly, UV-vis diffuse reflectance spectra (DRS) showed a remarkable enhancement of light absorption owing to the incorporation of the visible-light-active carbon core with the UV light-responsive TiO2 shell for increased solar energy utilization. Furthermore, electrochemical impedance spectra (EIS) revealed that the carbon content can influence the charge transfer efficiency of the carbon@TiO2 composites. This study can bring new insights into designing carbon@semiconductor nanostructures for applications such as solar energy conversion and storage.



, p. 194 (1950)




, p. 1255 (1958)


CO and CO2 methanation over Ni/Al@Al2O3 core–shell catalyst

Le, Thien An,Kim, Jieun,Kang, Jong Kyu,Park, Eun Duck

, p. 622 - 630 (2020)

Core–shell Al@Al2O3, which was obtained by hydrothermal surface oxidation of Al metal particles, was used as the support in supported Ni catalysts for CO and CO2 methanation. The core–shell micro-structured support (Al@Al2O3) helped develop a highly efficient Ni-based catalyst compared with conventional γ-Al2O3 for these reactions. Moreover, the deposition–precipitation method was shown to outperform the wet impregnation method in the preparation of the active supported Ni catalysts. The catalysts were characterized using various techniques, namely, N2 physisorption, H2 chemisorption, CO2 chemisorption, temperature-programmed reduction with H2, temperature-programmed desorption after CO2 adsorption, X-ray diffraction, inductively coupled plasma-atomic emission spectroscopy, high-resolution transmission electron microscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy. Higher Ni dispersion when using Al@Al2O3 as the support and the deposition–precipitation method resulted in better catalytic performance for CO methanation. Furthermore, the higher density of medium basic sites and enhanced CO2 adsorption capacity observed for Ni/Al@Al2O3 helped increase catalytic activity for CO2 methanation.



, p. 236,238 (1951)


Bimolecular reactions in real time: Ni+(2D5/2) + n-C4H10 elimination reactions

Noll, Robert J.,Weisshaar, James C.

, p. 10288 - 10289 (1994)



, p. 5197 (1954)

Reactions of NH Radicals. III. Photolysis of HN3 in the Presence of C2H4 at 313 nm

Kodama, Sukeya

, p. 2363 - 2370 (1983)

Photolysis of HN3 vapor in the presence of C2H4 was studied at 313 nm and 30 deg C.The main products were N2, H2, CH4, C2H6, NH4N3, C2H5N * HN3 (salt of C2H5N (azomethines) with HN3), HCN, CH3CN, CH3N3, and C2H5N3.The quantum yields of these products were measured as a function of the light intensity and pressures of HN3 and C2H4.The following mechanism for the main reactions was infered: HN3 + hv(313 nm) -> NH(a1Δ) + N2; NH(a1Δ) + HN3 -> 2N2 + 2H (2a); NH(a1Δ) + HN3 -> NH2 + N3 (2b); NH(a1Δ) + HN3 -> N2 + N2H2* (2c); NH(a1Δ) + C2H4 -> C2H5N* (aziridine and vinylamine) (3); C2H5N* -> CH3 + CH2N (4); C2H5N* -> H2 + CH3CN (5); C2H5N* -> H + C2H4N (6); C2H5N* -> C2H3 + NH2 (7).The rate constant ratios at 30 deg C are: k3/k2 = 1.64; k5/k4 = 0.102; k6/k4 = 0.564; k7/k4 = 0.734.The collisional deactivation from NH(a1Δ) to NH(X3Σ-) by C2H4 was not found.The lifetime of C2H5N* is much shorter than 6.8 * 10-11 s for C2H5NH2*(1Δ) + C2H6)).The relative and absolute rates for the reactions of NH(a1Δ) with HN3, Xe, C2H6, and C2H4 are discussed.


Isagulyants, G. V.,Greish, A. A.,Kovalenko, L. I.,Kostina, G. V.

, p. 2580 - 2583 (1987)




, p. 1148 (1958)



, p. 1 (1940)

McNesby et al.

, p. 823,825 (1954)

Kinetic isotope effects in the reduction of methyl iodide

Holm, Torkil

, p. 515 - 518 (1999)

α-Deuterium (α-D) kinetic isotope effects (KIEs) have been determined for the reaction of methyl iodide with a series of reducing agents. Reagents which transfer hydride ion in an SN2 reaction show small inverse or small normal KIEs. Reagents which transfer an electron to methyl iodide to produce methyl radical show large normal KIEs up to 20% per α-D. Large KIEs were found for the reaction of methyl iodide with sodium, for Pd-catalyzed reaction of methyl iodide with hydrogen, for electron transfer (ET) at a platinum cathode, for ET from benzophenone ketyl or from sodium naphthalenide, for iron-catalyzed ET from a Grignard reagent to methyl iodide, and for reduction of methyl iodide with tributyltin hydride or with gaseous hydrogen iodide. Very small KIEs were found for electron transfer to methyl iodide from magnesium in ether or from sodium in ammonia. The reason may be that these reactions are transport or diffusion controlled.

1,2-Pentadiene decomposition

Herzler, Juergen,Manion, Jeffrey A.,Tsang, Wing

, p. 755 - 767 (2001)

1,2-Pentadiene was decomposed in single pulse shock tube experiments. There appear to be a large number of parallel decomposition and isomerization channels. It was shown that the resonance energy of the 1,3-butadiene-2-yl radical is smaller than that of allyl radical by an amount equal to the π bond conjugation energy of butadiene.

Sworski et al.

, p. 1998 (1951)


, p. 1219 (1910)


Bragin, O. V.,Vasina, T. V.,Preobrazhenskii, A. V.,Palishkina, N. V.,Nefedov, B. K.,et al.

, (1983)


Evaluation of the Catalytic Relevance of the CO-Bound States of V-Nitrogenase

Lee, Chi Chung,Wilcoxen, Jarett,Hiller, Caleb J.,Britt, R. David,Hu, Yilin

, p. 3411 - 3414 (2018)

Binding and activation of CO by nitrogenase is a topic of interest because CO is isoelectronic to N2, the physiological substrate of this enzyme. The catalytic relevance of one- and multi-CO-bound states (the lo-CO and hi-CO states) of V-nitrogenase to C?C coupling and N2 reduction was examined. Enzymatic and spectroscopic studies demonstrate that the multiple CO moieties in the hi-CO state cannot be coupled as they are, suggesting that C?C coupling requires further activation and/or reduction of the bound CO entity. Moreover, these studies reveal an interesting correlation between decreased activity of N2 reduction and increased population of the lo-CO state, pointing to the catalytic relevance of the belt Fe atoms that are bridged by the single CO moiety in the lo-CO state. Together, these results provide a useful framework for gaining insights into the nitrogenase-catalyzed reaction via further exploration of the utility of the lo-CO conformation of V-nitrogenase.

Biochemical functions of corrinoid compounds. The sixth Hopkins memorial lecture.


, p. 1 - 15 (1967)


Adsorption and Catalytic Decomposition of Dimethyl Sulphide and Dimethyl Disulphide on Metal Films of Iron, Palladium, Nickel, Aluminium and Copper

Al-Haidary, Yousif Kadim,Saleh, Jalal Mohammed

, p. 3043 - 3058 (1988)

The interaction of dimethyl sulphide (Me2S) and dimethyl disulphide (Me2S2) has been studied with metal films of Fe, Pd, Ni, Al and Cu over the temperature ranges 193-500 K with Me2S and 223-600 K in the case of Me2S2.At 193 K mainly molecular chemisorption of Me2S occured on the films.With Me2S2, multilayer adsorption, involving both chemisorption and van der Waals adsorption took place on the films at 223 K.Dissociative chemisorption of Me2S or Me2S2 began above 300 K and was accompained by the evolution of gaesous products.The latter involved H2, CH4 and C2H6 gases with Me2S and H2, CH4, C2H6, MeSH and Me2S subsequent to the dissociation of Me2S2.Additional gaseous products throughout the decomposition on the oxidized films were CO, H2O and C2H4.The rate of Me2S or Me2S2 chemisorption depended on the pressure of the reacting gas, and the kinetic data indicated the operation of a compensation effect throughout the interaction of Me2S or Me2S2 with the films.On the basis of kinetic data it was possible to arrange the metal films in the order of decreasing activity toward Me2S or Me2S2 adsorption.The transition-metal films showed greater activity than Al and Cu, and among the former films Fe showed the greatest activity, for chemisorption of Me2S and Me2S2.All the metals have higher tendencies for Me2S adsorption than for Me2S2.


, p. 1424 (1956)


, p. 1679,1682 (1952)

Homogeneous Hydrogenation of Carbon Dioxide to Methanol Catalyzed by Ruthenium Cluster Anions in the Presence of Halide Anions

Tominaga, Ken-ichi,Sasaki, Yoshiyuki,Watanabe, Taiki,Saito, Masahiro

, p. 2837 - 2842 (1995)

Methanol, together with methane, is formed for the first time by homogeneous hydrogenation of CO2 using a catalytic system consisting of Ru3(CO)12 and alkaline iodides in N-methylpyrrolidone (NMP) solution at 240 deg C.The time course of the reaction indicates the successive formation of CO, methanol, and then methane.The FT-IR analysis of the resulting reaction solutions reveals the formation of several species of ruthenium carbonyl anion and their mutual interchanges during the reaction.A mechanism for the overall reaction is proposed, based on these results.

Floriani,C. et al.

, p. 209 - 223 (1968)


, p. 1485,1488 (1957)

One-Pass Conversion of Benzene and Syngas to Alkylbenzenes by Cu–ZnO–Al2O3 and ZSM-5 Relay

Han, Tengfei,Xu, Hong,Liu, Jianchao,Zhou, Ligong,Li, Xuekuan,Dong, Jinxiang,Ge, Hui

, p. 467 - 479 (2021/05/21)

Alkylbenzenes have a wide range of uses and are the most demanded aromatic chemicals. The finite petroleum resources compels the development of production of alkylbenzenes by non-petroleum routes. One-pass selective conversion of benzene and syngas to alkylbenzenes is a promising alternative coal chemical engineering route, yet it still faces challenge to industrialized applications owing to low conversion of benzene and syngas. Here we presented a Cu–ZnO–Al2O3/ZSM-5 bifunctional catalyst which realizes one-pass conversion of benzene and syngas to alkylbenzenes with high efficiency. This bifunctional catalyst exhibited high benzene conversion (benzene conversion of 50.7%), CO conversion (CO conversion of 55.0%) and C7&C8 aromatics total yield (C7&C8 total yield of 45.0%). Characterizations and catalytic performance evaluations revealed that ZSM-5 with well-regulated acidity, as a vital part of this Cu–ZnO–Al2O3/ZSM-5 bifunctional catalyst, substantially contributed to its performance for the alkylbenzenes one-pass synthesis from benzene and syngas due to depress methanol-to-olefins (MTO) reaction. Furthermore, matching of the mass ratio of two active components in the dual-function catalyst and the temperature of methanol synthesis with benzene alkylation reactions can effectively depress the formation of unwanted by-products and guarantee the high performance of tandem reactions. Graphic Abstract: [Figure not available: see fulltext.]

Investigation on the Thermal Cracking and Interaction of Binary Mixture of N-Decane and Cyclohexane

Chen, Xuejiao,Pang, Weiqiang,Wang, Bo,Zhang, Ziduan,Zhou, Lingxiao,Zhu, Quan

, (2022/03/02)

Abstract: The investigation about the thermal cracking performance and interaction of different components in hydrocarbon fuels is of great significance for optimizing the formulation of high-performance hydrocarbon fuels. In this work, thermal cracking of n-decane, cyclohexane and their binary mixture were studied in a tubular reactor under different temperatures and pressures. The gas and liquid products were analyzed in detail with different gas chromatography. The main gas products of pure n-decane and cyclohexane are similar, and there is a certain difference in the main liquid products. For binary mixture, the overall conversion rate and gas yield are lower than their theoretical value. The cracking conversion rate of n-decane in binary mixture is lower than that in pure n-decane, but the opposite change occurs for cyclohexane, and the effect become more obvious as the increase of the reaction pressure. These experimental phenomena can be explained by bond dissociation energy and free radical reaction mechanism. The pressure affects the free radical reaction path, and high pressure is more conducive to bimolecular hydrogen abstraction reaction, which will lead to different product content. A law of interaction between the n-decane and cyclohexane was observed according to the experimental results. [Figure not available: see fulltext.]

Impact of oxygen vacancies in Ni supported mixed oxide catalysts on anisole hydrodeoxygenation

Ali, Hadi,Kansal, Sushil Kumar,Lauwaert, Jeroen,Saravanamurugan, Shunmugavel,Thybaut, Joris W.,Vandevyvere, Tom

, (2022/03/02)

The hydrodeoxygenation (HDO) activity of anisole has been investigated over Ni catalysts on mixed metal oxide supports containing Nb–Zr and Ti–Zr in 1:1 and 1:4 ratios. XRD patterns indicate the incorporation of Ti (or Nb) into the ZrO2 framewo

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